Propeller for boats.



A. F. HBNRIGHSEN.

PROPELLER FOR BOATS.

APPLICATION FILED FE11M, 1914.

Patented Dec. 29, 1914,

TNTTE AUGUST F. HENRICHSEN, OF MEMPHS, TENNESSEE.

PROPELLER. FOR BOATS.

Specification of Letters Patent.

Patented Dec. 291, 1914.

Application led February 14, 1914. Serial No. 818,746.

T o all whom it may concern:

Be it known that I, AUGUs'r F. HnNRicI-isnN, a citizen of the United States, residing at Memphis, in the county of Shelby and State of Tennessee, have invented certain new and useful Improvements in Propellers for Boats, of which the following is a specification.

This invention relates to propellers for boats and the primary object of the invention is to improve the construction and 0peration of such devices.

A principal object of the invention is to provide a propeller of improved construction which may be readily secured upon and removed from 'the shaft and in which each blade is carried by a separate section of the hub, all of said sections coperating to securely hold each other in position on the shaft.

A further object of the invention is to provide a sectional propeller' of improved construction whereby said sections may be separately removed from or secured upon the shaft without the use of bolts or splines.

With these objects in view, the invention consists in the improved construction, arrangement and combination of the parts of a propelle of the specified class, all lof which will e hereinafter fully described and afterward specifically claimed.

In order that the construction and operation thereof may be readily comprehendedJ will now proceed to fully describe my invention, in connection with the accompanying drawings, which illustrate an approved embodiment thereof and in whichm Figure 1 represents a sectional view on the transverse vertical plane indicated by the broken line 1 1, of Fig. 2, and Fig. 2 represents a sectional view on the longitudinal plane indicated by the broken line 2--2, of Fig. 1.

Like reference `characters indicate the same parts wherever they appear in either of the figures.

Referring specifically to the drawings 3 indicates the shaft which is of any suitable or approved construction or material, being, in this instance, indicated as cylindrical, upon which shaft is suitably secured a sleeve 4 provided at its end with exterior threads 5 and 6, said sleeve being of any suitable material and rigidly secured against sliding or turning upon the shaft. That portion of the sleeve 4 between the threads lis herein shown as smooth and c lindrical but this 1s not absolutely necessary s such port1on may, if desired, be made rough, or of angular construction.

7, 9 and 11 indicate the propeller blades of any suitable or approved construction and material, each of which blades is mounted on a hub section, as at 8, 10 and 12, which sections are correspondingly shaped so that their interior surfaces, when they are brought together, will closely fit upon the exterior of the sleeve 4, the longitudinal edges being rabbeted, as at 13, 14-and 15, so that one edge of each is overlapped by the adjacent edge of the adjoining hub section, as clearly shown in Fig. 1.

The outer ends of the hub sections are tapered, as at 16'in Fig. 2, so that when the three sections are fitted upon the sleeve 4, said assembled outer ends taken together will form a frustum of a cone, which will be adjustable longitudinally on the sleeve 4.

Threaded upon the outer threaded ends 5 and G of the sleeve 4 are two nuts or sleeves 17 and 20, which are provided with angular sections 18 and 21 to receive wrenches or turning tools, and with inwardly projecting ends 19 and 22, which are hollow, to project over the ends of the conic frustum formed by assembling the hub sections, theinterior of each of said projecting ends 19 and 22 being also of the form of a conic frustum `so that it will closely fit over the ends of the assembled hub sections which it embraces. y

When the nuts or sleeves 17 and 20 are turned inward, or toward each other, the ends 19 and 22 ride up on the conic frustums formed of the assembled hub sections with a wedge-like action, squeezing the tapered ends of said hub sections closely together and upon the sleeve 4, thus firmly gripping the sleeve and causing the overlapping edges of adjacent hub sections to firmly engage each other and hold the sections firmly together.

At 23, 24 I'have shown lock-nuts 23, 24 threaded on the ends 5 and G of the sleeve 4, which nuts, when turned tightly inward, against the nuts or sleeves 17 and 20, will firmly hold the said nuts or sleeves against accidental loosening or displacement and, consequently, firmly hold all of the parts in assembled position.

From the foregoing description, the construction and operation of my invention will 'he readilyl nndmstfoml without full-"hm" uhu'idation lmt l dvhjil'c it to he .nl idui'stoml. l @that slighl'fclmngcs and variationsmay lm.

fmadu in thv construction and opolation ol" *the sovoral vparts, without departing 'l'l'om thospirit and scope ol'thc invention as hci'oina l'tcl" claimed. v

Having thus' fullyl dost-,Filled my lnvcntion Vwhat I claim as now and desire to sc- @aura by Iastteis latcnt yof the' United propeller wheel for boats connh'ising a plurality of hub sertions, cach carrying a bladia cal-h of said-scvtuns having one, oi its' longitudinal edgvs constructed tir-over# lap the adjacent edge of the adjoining scction, andthe outer faceskifits ends tapered upon tho cnd'So'f thdslvlalt Sleat-aand having inwardly prolotmg 4ends overlapplng tlmv ands ol th.A assmnblcd hub sections.'

ln testimony wholoof I allix myslgnatur in prosoncc of two wltnesSs. r

E. K. 'Tnnulilvmtl i J. H. LOUD.

H ENRICHSEN 

